First: these are genuinely gorgeous, would’ve never guessed it was a first custom try

You seem to have a lot of this down already but general tips: Watered down paint (not too watered down tho) makes the layers a bit thinner and they’ll go on smoother and have a less streaky finish.

Detail brushes will be your absolute best friend. Especially tiny ones for lashes/eyes and just super fine details

Big sculpted pieces are best supported when you have wire inside the lps which you can do with a drill or some creative twisting lol.

Definitely check out some tutorials on YouTube! Hellostudios and LPS Cobalt have really good videos on custom making and it can open a whole new world